Heat exchange element and heat exchange ventilation device

Abstract

The heat exchange element comprises a first flow path forming member (1) and a second flow path forming member which are alternately stacked. The first flow path forming member (1) and the second flow path forming member respectively comprise: a rib (31) having a first wall portion constituting an end portion of a first flow path in a first direction, a second wall portion constituting an end portion of a second flow path in the first direction, and a third wall portion for separating the first flow path and the second flow path adjacent to each other in a second direction; a plate portion (15) connected to an end portion (37) in a third direction of the rib (31) and separating a first connecting flow path connected to the first flow path and a second connecting flow path connected to the second flow path; a first sealing portion (38) provided at an end portion (37) of the rib (31) and blocking the first flow path and the second connecting flow path; and a second sealing portion (39) provided at an end portion (37) of the rib (31) and blocking the second flow path and the first connecting flow path.

Description

Technical Field

[0001] The present disclosure relates to a heat exchange element and a heat exchange ventilator for performing heat exchange between air flows. Background Art

[0002] A heat exchange ventilator is known that performs heat exchange between a supply airflow from outside to inside and an exhaust airflow from inside to outside. By performing ventilation using a heat exchange element, the efficiency of indoor cooling and heating can be improved, the energy used for indoor air conditioning can be reduced, and high-quality air quality can be ensured indoors.

[0003] A general heat exchange element is provided with a plate for separating a flow path through which a supply airflow passes from a flow path through which an exhaust airflow passes, and a retaining member for maintaining a distance between the plates. In order to improve the heat exchange efficiency, it is desired that the heat exchange element can efficiently transfer heat between the flow paths.

[0004] In the heat exchange element, in the form of circulating the supply airflow and the exhaust airflow, there are known two types: a direct flow type in which the direction of the supply airflow through the heat exchange element and the direction of the exhaust airflow through the heat exchange element are perpendicular to each other, and an opposed flow type in which the direction of the supply airflow through the heat exchange element and the direction of the exhaust airflow through the heat exchange element are opposite to each other. Under the condition that the pressure losses are the same, the heat exchange efficiency per unit volume of the opposed flow type heat exchange element is theoretically higher than that of the direct flow type. Therefore, most of the conventional heat exchange ventilation devices use the opposed flow type heat exchange element.

[0005] Patent document 1 discloses a heat exchange element having a plurality of flow paths formed by plates, and the cross section of each flow path is rectangular. The plates play a role in separating mutually adjacent flow paths from each other. The heat exchange element of patent document 1 can increase the heat exchange amount because it can perform heat exchange between air flows on the entire surface constituting the flow path. In addition, since the cross section of each flow path of the heat exchange element of patent document 1 is rectangular, each flow path is not easily flattened when each layer constituted by the plate is stacked, which can reduce pressure loss. In addition, since each flow path of the heat exchange element of patent document 1 is constituted only by plates, the number of components can be reduced.

[0006] Patent Document 1: International Publication No. 2013 / 091099

[0007] In the conventional heat exchange element disclosed in Patent Document 1, as a means for further improving the heat exchange efficiency, it is considered to increase the number of stacked plates. However, in order to accommodate the heat exchange element in the heat exchange ventilation device, the increase in the number of plates accompanying the enlargement of the heat exchange element is limited. In order to increase the number of plates without enlarging the heat exchange element, it is considered to reduce the cross-sectional area of ​​each flow path. In this case, the problem of increased pressure loss occurs. Summary of the invention

[0008] The present disclosure is made in view of the above situation, and an object of the present disclosure is to obtain a heat exchange element capable of improving heat exchange efficiency.

[0009] In order to solve the above-mentioned problems and achieve the purpose, the heat exchange element disclosed in the present invention has a first flow path forming part and a second flow path forming part which are alternately stacked and constitute an opposing flow portion, the opposing flow portion including a first flow path for air to pass through and a second flow path for air to flow in a direction opposite to the air passing through the first flow path. The first flow path forming part and the second flow path forming part respectively have: a rib having: a first wall portion constituting an end portion of a first flow path in a first direction in which the first flow path forming part and the second flow path forming part are stacked, a second wall portion constituting an end portion of a second flow path in the first direction, and a third wall portion separating the first flow path and the second flow path adjacent to each other in a second direction perpendicular to the first direction, and constituting the opposing flow portion. The first flow path forming component and the second flow path forming component respectively include: a plate portion, which is connected to the end of the rib portion in a third direction perpendicular to the first direction and the second direction, and separates a first connecting flow path connected to the first flow path and a second connecting flow path connected to the second flow path; a first closing portion, which is arranged at the end of the rib portion and blocks the first flow path and the second connecting flow path; and a second closing portion, which is arranged at the end of the rib portion and blocks the second flow path and the first connecting flow path.

[0010] The heat exchange element of the present disclosure has the effect of improving heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a perspective view showing the overall structure of the heat exchange element according to Embodiment 1.

[0012] Figure 2 This is a perspective view showing a first flow path forming member constituting the heat exchange element according to Embodiment 1.

[0013] Figure 3 This is a perspective view showing a second flow path forming member constituting the heat exchange element according to Embodiment 1.

[0014] Figure 4 This is a perspective view showing an opposing flow portion included in the heat exchange element according to Embodiment 1.

[0015] Figure 5 Yes means Figure 2 A perspective view of a portion of the first flow path forming member shown.

[0016] Figure 6 Yes means Figure 5 A perspective view of the ribs in the structure shown.

[0017] Figure 7 Yes means Figure 5 A perspective view of the ribs and closure in the illustrated configuration.

[0018] Figure 8 This is a perspective view showing a first flow path and a second flow path formed in an opposing flow portion of the heat exchange element according to Embodiment 1.

[0019] Fig. 9 Yes means Figure 8 A top view of the first flow path, the second flow path and the plate portion is shown.

[0020] Fig.10 It means composition Figure 8 as well as Fig. 9 FIG. 1 is a diagram showing a cross section of a first flow path and a center portion of a first flow path layer and a second flow path layer in the Y-axis direction.

[0021] Fig.11 This is a first diagram for explaining how the supply air flow and the exhaust air flow pass through the heat exchange element according to Embodiment 1.

[0022] Fig.12 This is a second diagram for explaining how the supply air flow and the exhaust air flow pass through the heat exchange element of Embodiment 1.

[0023] Fig.13 The third diagram is used to explain how the supply air flow and the exhaust air flow pass through the heat exchange element according to the first embodiment.

[0024] Fig.14 This is a diagram showing a cross section of a rib constituting the heat exchange element according to the second embodiment.

[0025] Fig.15 This is a schematic cross-sectional view of a sheet constituting the heat exchange element according to the second embodiment.

[0026] Fig.16 It is a perspective view showing the overall structure of a heat exchange element according to Embodiment 3.

[0027] Fig.17 This is a diagram showing a schematic structure of a heat exchange ventilator according to a fourth embodiment. DETAILED DESCRIPTION

[0028] Hereinafter, a heat exchange element and a heat exchange ventilator according to the embodiments will be described in detail with reference to the drawings.

[0029] Implementation method 1.

[0030] Figure 11 is a perspective view showing the overall structure of the heat exchange element of Embodiment 1. The heat exchange element 100 of Embodiment 1 is an opposing flow type heat exchange element. The heat exchange element 100 is a stacked body having first flow path forming parts 1 and second flow path forming parts 2 stacked alternately. The number of first flow path forming parts 1 constituting the heat exchange element 100 and the number of second flow path forming parts 2 constituting the heat exchange element 100 are both arbitrary. In the following description, the so-called stacking direction refers to the direction in which the first flow path forming parts 1 and the second flow path forming parts 2 are stacked.

[0031] A first flow path and a second flow path are formed in the heat exchange element 100. The first flow path and the second flow path are configured so that the air passing through the first flow path and the air passing through the second flow path will not mix with each other. In Embodiment 1, the first flow path is a supply flow path for a supply airflow from the outdoors to the indoors. The second flow path is an exhaust flow path for an exhaust airflow from the indoors to the outdoors. An opposing flow section 3 for performing heat exchange between a supply airflow and an exhaust airflow is formed in the heat exchange element 100. The opposing flow section 3 includes a first flow path and a second flow path, and the second flow path allows the exhaust airflow to flow in a direction opposite to the supply airflow passing through the first flow path. That is, in the opposing flow section 3, the traveling direction of the supply airflow and the traveling direction of the exhaust airflow differ from each other by 180 degrees.

[0032] Figure 2 This is a perspective view showing a first flow path forming member constituting the heat exchange element according to Embodiment 1. Figure 3 This is a perspective view showing a second flow path forming member constituting the heat exchange element according to Embodiment 1.

[0033] The first flow path forming member 1 includes a first flow path layer 10, a first inlet header 11, and a first outlet header 12 constituting the opposing flow portion 3. The second flow path forming member 2 includes a second flow path layer 20, a second inlet header 21, and a second outlet header 22 constituting the opposing flow portion 3. The opposing flow portion 3 is composed of the first flow path layer 10 and the second flow path layer 20 stacked alternately.

[0034] The first inlet header portion 11 has a plate portion 15 and a flow path wall 17 erected from the plate portion 15. The end portion 13 of the plate portion 15 constitutes an inlet of the supply air flow in the heat exchange element 100. The first inlet header portion 11 constitutes an inlet-side flow path between the inlet of the supply air flow and the opposing flow portion 3. The flow path wall 17 guides the supply air flow from the inlet of the supply air flow to the opposing flow portion 3. The first outlet header portion 12 has a plate portion 16 and a flow path wall 18 erected from the plate portion 16. The end portion 14 of the plate portion 16 constitutes an outlet of the supply air flow in the heat exchange element 100. The first outlet header portion 12 constitutes an outlet-side flow path between the outlet of the supply air flow and the opposing flow portion 3. The flow path wall 18 guides the supply air flow from the opposing flow portion 3 to the outlet of the supply air flow. In embodiment 1, the plate portion 15 and the plate portion 16 are respectively flat plates perpendicular to the stacking direction.

[0035] The second inlet header section 21 includes a plate section 25 and a flow path wall 27 erected from the plate section 25. The end 23 of the plate section 25 constitutes an inlet of the exhaust flow in the heat exchange element 100. The second inlet header section 21 constitutes an inlet-side flow path between the inlet of the exhaust flow and the opposing flow section 3. The flow path wall 27 guides the exhaust flow from the inlet of the exhaust flow to the opposing flow section 3. The second outlet header section 22 includes a plate section 26 and a flow path wall 28 erected from the plate section 26. The end 24 of the plate section 26 constitutes an outlet of the exhaust flow in the heat exchange element 100. The second outlet header section 22 constitutes an outlet-side flow path between the outlet of the exhaust flow and the opposing flow section 3. The flow path wall 28 guides the exhaust flow from the opposing flow section 3 to the outlet of the exhaust flow. In Embodiment 1, the plate section 25 and the plate section 26 are respectively flat plates perpendicular to the stacking direction.

[0036] The first inlet headers 11 and the second outlet headers 22 are alternately stacked. The first inlet headers 11 are covered with the surface of the plate 26 opposite to the surface provided with the flow path wall 28, thereby forming an inlet side flow path for the supply airflow. The second outlet headers 22 are covered with the surface of the plate 15 opposite to the surface provided with the flow path wall 17, thereby forming an outlet side flow path for the exhaust airflow.

[0037] The first outlet headers 12 and the second inlet headers 21 are alternately stacked. The first outlet headers 12 are covered with the surface of the plate 25 opposite to the surface provided with the flow path wall 27, thereby forming an outlet side flow path for the supply airflow. The second inlet headers 21 are covered with the surface of the plate 16 opposite to the surface provided with the flow path wall 18, thereby forming an inlet side flow path for the exhaust airflow.

[0038] Figure 4 1 is a perspective view showing the opposing flow portion of the heat exchange element of Embodiment 1. Figure 4 2 shows an end portion of the first flow path layer 10 connected to the inlet side flow path of the supply air flow and an end portion of the second flow path layer 20 connected to the outlet side flow path of the exhaust air flow.

[0039] The X-axis, Y-axis and Z-axis are three axes that are orthogonal to each other. The first direction, namely the Z-axis direction, is the stacking direction. The second direction, namely the X-axis direction, is a direction perpendicular to the first direction. The third direction, namely the Y-axis direction, is a direction perpendicular to the first direction and the second direction. The supply airflow and the exhaust airflow through the opposing flow section 3 flow in opposite directions in the Y-axis direction. In the respective directions of the X-axis direction, the Y-axis direction and the Z-axis direction, the side indicated by the arrow in the figure is set as the positive side, and the side opposite to the arrow is set as the negative side.

[0040] Each of the plurality of first flow path layers 10 constituting the opposing flow portion 3 has a sheet 30 formed with a plurality of ribs 31. Each rib 31 is constituted by a wall portion formed by bending the sheet 30. In the first flow path layer 10, the plurality of ribs 31 are arranged in the X-axis direction.

[0041] Each of the plurality of second flow path layers 20 constituting the opposing flow portion 3 has a sheet 40 formed with a plurality of ribs 41. Each rib 41 is constituted by a wall portion formed by bending the sheet 40. In the second flow path layer 20, the plurality of ribs 41 are arranged in the X-axis direction.

[0042] In the opposing flow section 3, the space constituting the first flow path and the space constituting the second flow path are constituted by the ribs 31 and 41. In the ZX cross section of the opposing flow section 3, the space constituting the first flow path and the space constituting the second flow path are respectively divided into rectangles by the ribs 31 and 41. The rectangle is a rectangle whose length in the Z-axis direction is longer than its length in the X-axis direction, and is a trapezoid or a rectangle. Figure 4 2 shows an example in which the space constituting the first flow path and the space constituting the second flow path are partitioned into a trapezoidal shape by the ribs 31 and 41, respectively.

[0043] The sheets 30 and 40 are heat-conductive sheets, and are metal sheets or resin sheets. The resin sheets may also be moisture-permeable resin sheets. The sheets 30 and 40 are bent by a process such as stamping, compression molding, or vacuum molding, thereby forming the ribs 31 and 41.

[0044] Next, the structure of the first flow channel forming member 1 will be described. Figure 5 Yes means Figure 2 A perspective view of a portion of the first flow path forming member shown. Figure 6 Yes means Figure 5 A perspective view of the ribs in the structure shown. Figure 7 Yes means Figure 5 A perspective view of the ribs and closure in the illustrated configuration.

[0045] exist Figure 5 , Figure 6 as well as Figure 7 1 and 2 show a portion including an end portion 37 on the positive side in the Y-axis direction of one rib 31 . The rib 31 includes side wall portions 32 , 33 , 34 , an upper surface portion 35 , and a lower surface portion 36 .

[0046] The side walls 32, 33, and 34 are thin plate-like wall portions that stand upright at intervals from each other in the X-axis direction. Figure 5 , Figure 6 as well as Figure 7 The side walls 32, 33, 34 are shown standing in the Z-axis direction. The side walls 32, 33, 34 may be inclined relative to the Z-axis direction.

[0047] The upper surface portion 35 covers the space between the two side walls 32 and 33 from the positive side in the Z-axis direction. The lower surface portion 36 covers the space between the two side walls 33 and 34 from the negative side in the Z-axis direction. Figure 5 , Figure 6 as well as Figure 7 The upper surface portion 35 and the lower surface portion 36 shown are respectively flat plate portions parallel to the X-axis direction and the Y-axis direction. The upper surface portion 35 and the lower surface portion 36 are not limited to being flat plate-shaped, and may be curved.

[0048] The space surrounded by the lower surface portion 36 and the side walls 33 and 34 is the first flow path. The lower surface portion 36 is the first wall portion that constitutes the end portion of the first flow path on the negative side in the Z-axis direction. The space surrounded by the upper surface portion 35 and the side walls 32 and 33 is the second flow path. The upper surface portion 35 is the second wall portion that constitutes the end portion of the second flow path on the positive side in the Z-axis direction. Each of the side walls 32, 33, 34 is a third wall portion that separates the first flow path and the second flow path that are adjacent to each other in the X-axis direction. In addition, as Figure 5 , Figure 6 as well as Figure 7 As shown, when each side wall portion 32, 33, 34 is erected along the Z-axis direction, in the ZX cross section, the space constituting the first flow path and the space constituting the second flow path are respectively divided into rectangular shapes. When each side wall portion 32, 33, 34 is inclined relative to the Z-axis direction, in the ZX cross section, the space constituting the first flow path and the space constituting the second flow path are respectively divided into trapezoidal shapes.

[0049] The plate portion 15 is connected to the end portion 37 of the rib portion 31. The plate portion 15 is arranged at the center position of the length of the rib portion 31 in the Z-axis direction. The plate portion 15 separates the inlet side flow path of the supply air flow from the outlet side flow path of the exhaust air flow. That is, the first connecting flow path connected to the first flow path, that is, the inlet side flow path of the supply air flow, and the second connecting flow path connected to the second flow path, that is, the outlet side flow path of the exhaust air flow, are separated by the plate portion 15. Figure 5 , Figure 6 as well as Figure 7 In the space shown in the figure, which is on the positive side of the Y-axis direction relative to the rib 31, the space on the positive side of the Z-axis direction relative to the plate 15 is the inlet side flow path of the supply airflow. Figure 5 , Figure 6 as well as Figure 7 Of the spaces shown above on the positive side in the Y-axis direction relative to the rib portion 31 , the spaces on the negative side in the Z-axis direction relative to the plate portion 15 serve as outlet-side flow paths for the exhaust flow.

[0050] like Figure 5 as well as Figure 7As shown, the first flow path forming member 1 has a first closing portion 38 and a second closing portion 39 as closing portions provided at the end portion 37 of the rib portion 31. The first closing portion 38 blocks the first flow path surrounded by the lower surface portion 36 and the side wall portions 33 and 34 from the outlet side flow path of the exhaust flow. The second closing portion 39 blocks the second flow path surrounded by the upper surface portion 35 and the side wall portions 32 and 33 from the inlet side flow path of the supply flow. In Embodiment 1, the first closing portion 38 and the second closing portion 39 are flat plates parallel to the X-axis direction and the Z-axis direction, respectively.

[0051] The portion of the rib 31 including the end portion on the negative side in the Y-axis direction has Figure 5 , Figure 6 as well as Figure 7 The portion including the end portion 37 on the positive side in the Y-axis direction of the rib 31 shown has the same structure. Figure 2 The plate portion 16 shown is joined to the end portion on the negative side in the Y-axis direction of the rib portion 31. The plate portion 16 is arranged at the center position of the length of the rib portion 31 in the Z-axis direction in the same manner as the plate portion 15. The plate portion 16 separates the outlet side flow path of the supply air flow from the inlet side flow path of the exhaust air flow. That is, the first connecting flow path connected to the first flow path, i.e., the outlet side flow path of the supply air flow, and the second connecting flow path connected to the second flow path, i.e., the inlet side flow path of the exhaust air flow, are separated by the plate portion 16. In the space closer to the negative side in the Y-axis direction than the rib portion 31, the space closer to the positive side in the Z-axis direction than the plate portion 16 is the outlet side flow path of the supply air flow. In the space closer to the positive side in the Y-axis direction than the rib portion 31, the space closer to the negative side in the Z-axis direction than the plate portion 16 is the inlet side flow path of the exhaust air flow.

[0052] The end portion of the rib 31 on the negative side in the Y-axis direction is provided with a first closing portion 38 and a second closing portion 39, similarly to the end portion 37 of the rib 31. The first closing portion 38 closes off the first flow path and the inlet flow path of the exhaust flow. The second closing portion 39 closes off the second flow path and the outlet flow path of the supply flow.

[0053] The second flow path forming member 2 has the same structure as the first flow path forming member 1. The rib 41 and Figure 5 , Figure 6 as well as Figure 7 The rib 31 shown likewise has side wall portions 32 , 33 , 34 , an upper surface portion 35 and a lower surface portion 36 .

[0054] Figure 4 The portion of the rib 41 shown including the end portion on the positive side in the Y-axis direction has the same structure as the portion of the rib 31 including the end portion 37 on the positive side in the Y-axis direction. Figure 3The plate portion 26 shown is joined to the end portion of the rib portion 41 on the positive side in the Y-axis direction. The plate portion 26 is arranged at the center position of the length of the rib portion 41 in the Z-axis direction. The plate portion 26 separates the outlet side flow path of the exhaust flow from the inlet side flow path of the supply flow. That is, the first connecting flow path connected to the first flow path, that is, the inlet side flow path of the supply flow, and the second connecting flow path connected to the second flow path, that is, the outlet side flow path of the exhaust flow, are separated by the plate portion 26. In the space that is closer to the positive side in the Y-axis direction than the rib portion 41, the space that is closer to the positive side in the Z-axis direction than the plate portion 26 is the outlet side flow path of the exhaust flow. In the space that is closer to the positive side in the Y-axis direction than the rib portion 41, the space that is closer to the negative side in the Z-axis direction than the plate portion 26 is the inlet side flow path of the supply flow.

[0055] The end portion of the rib 41 on the positive side in the Y-axis direction is provided with a first sealing portion 38 and a second sealing portion 39, similarly to the end portion 37 of the rib 31. The first sealing portion 38 blocks the first flow path and the outlet flow path of the exhaust flow. The second sealing portion 39 blocks the second flow path and the inlet flow path of the supply flow.

[0056] The portion of the rib 41 including the end portion on the negative side in the Y-axis direction has a Figure 5 , Figure 6 as well as Figure 7 The portion including the end portion 37 on the positive side in the Y-axis direction of the rib 31 shown has the same structure. Figure 3 The plate portion 25 shown is joined to the end portion on the negative side in the Y-axis direction of the rib portion 41. The plate portion 25 is arranged at the center position of the length of the rib portion 41 in the Z-axis direction. The plate portion 25 separates the inlet side flow path of the exhaust flow from the outlet side flow path of the supply flow. That is, the first connecting flow path connected to the first flow path, i.e., the outlet side flow path of the supply flow, and the second connecting flow path connected to the second flow path, i.e., the inlet side flow path of the exhaust flow, are separated by the plate portion 25. In the space on the negative side in the Y-axis direction of the rib portion 41, the space on the positive side in the Z-axis direction than the plate portion 25 is the inlet side flow path of the exhaust flow. In the space on the negative side in the Y-axis direction than the rib portion 41, the space on the negative side in the Z-axis direction than the plate portion 25 is the outlet side flow path of the supply flow.

[0057] The end portion of the rib 41 on the negative side in the Y-axis direction is provided with a first closing portion 38 and a second closing portion 39, similarly to the end portion 37 of the rib 31. The first closing portion 38 closes off the first flow path and the inlet flow path of the exhaust flow. The second closing portion 39 closes off the second flow path and the outlet flow path of the supply flow.

[0058] Next, the first flow path and the second flow path formed in the opposing flow portion 3 will be described. Figure 8 This is a perspective view showing a first flow path and a second flow path formed in an opposing flow portion of the heat exchange element according to Embodiment 1. Fig. 9 Yes means Figure 8 A top view of the first flow path, the second flow path and the plate portion is shown.

[0059] exist Figure 8 Schematically shows the first flow path layer 10 composed of the rib 31, the first sealing portion 38 and the second sealing portion 39, and the second flow path layer 20 composed of the rib 41, the first sealing portion 38 and the second sealing portion 39. Figure 8 : shows the end of the first flow path layer 10 on the positive side in the Y-axis direction and the end of the second flow path layer 20 on the positive side in the Y-axis direction. Fig. 9 The structure of the end portion of the opposing flow portion 3 on the positive side in the Y-axis direction is shown in FIG. Figure 8 as well as Fig. 9 The boundary between the rib 31 and the first sealing portion 38, the boundary between the rib 31 and the second sealing portion 39, the boundary between the rib 41 and the first sealing portion 38, and the boundary between the rib 41 and the second sealing portion 39 are omitted. Figure 8 Although the first flow path layer 10 and the second flow path layer 20 are shown separated from each other in FIG. 1 , the first flow path layer 10 and the second flow path layer 20 adjacent to each other in the Z-axis direction are joined to each other.

[0060] exist Fig. 9 In the structure shown, the first flow path 51 is formed in the first flow path layer 10 at a position closer to the positive side in the Z-axis direction than the plate portion 15. In the end of the first flow path layer 10 on the positive side in the Y-axis direction, the region adjacent to the first flow path 51 in the X-axis direction is blocked by the second blocking portion 39. The second flow path 52 is formed in the first flow path layer 10 at a position closer to the negative side in the Z-axis direction than the plate portion 15. In the end of the first flow path layer 10 on the positive side in the Y-axis direction, the region adjacent to the second flow path 52 in the X-axis direction is blocked by the first blocking portion 38. Approximately half of the region in the end of the first flow path layer 10 on the positive side in the Y-axis direction is blocked by the first blocking portion 38 or the second blocking portion 39.

[0061] In addition, Fig. 9 In the structure shown, the second flow path 52 is formed in the second flow path layer 20 at a position closer to the positive side in the Z-axis direction than the plate portion 26. In the end of the second flow path layer 20 on the positive side in the Y-axis direction, the region adjacent to the second flow path 52 in the X-axis direction is blocked by the first blocking portion 38. The first flow path 51 is formed in the second flow path layer 20 at a position closer to the negative side in the Z-axis direction than the plate portion 26. In the end of the second flow path layer 20 on the positive side in the Y-axis direction, the region adjacent to the first flow path 51 in the X-axis direction is blocked by the second blocking portion 39. Approximately half of the region in the end of the second flow path layer 20 on the positive side in the Y-axis direction is blocked by the first blocking portion 38 or the second blocking portion 39.

[0062] Fig.10 It means composition Figure 8 as well as Fig. 9FIG. 1 is a cross-sectional view of the center portion of the first flow path and the second flow path layer in the Y-axis direction of the first flow path and the second flow path layer shown. In the first flow path layer 10, the plurality of first flow paths 51 and the plurality of second flow paths 52 are separated from each other by the side wall portions 32, 33, and 34 of the rib portion 31, respectively. In the second flow path layer 20, the plurality of first flow paths 51 and the plurality of second flow paths 52 are separated from each other by the side wall portions 32, 33, and 34 of the rib portion 41. The first flow paths 51 of the first flow path layer 10 and the second flow paths 52 of the second flow path layer 20 are separated from each other by the lower surface portion 36. The second flow paths 52 of the first flow path layer 10 and the first flow paths 51 of the second flow path layer 20 are separated from each other by the upper surface portion 35.

[0063] Fig.11 This is a first diagram for explaining how the supply air flow and the exhaust air flow pass through the heat exchange element according to Embodiment 1. Fig.12 This is a second diagram for explaining how the supply air flow and the exhaust air flow pass through the heat exchange element of Embodiment 1. Fig.13 The third diagram is used to explain how the supply air flow and the exhaust air flow pass through the heat exchange element according to the first embodiment.

[0064] exist Fig.11 FIG. 5 shows a state where the supply airflow 57 and the exhaust airflow 58 pass through the flow path on the positive side of the first flow path layer 10 and the second flow path layer 20 in the Y-axis direction. Fig.12 FIG. 5 shows a state where the supply airflow 57 and the exhaust airflow 58 pass through the end portion of the first flow path layer 10 on the positive side in the Y-axis direction. Fig.13 FIG. 5 shows the flow of the supply air 57 and the exhaust air 58 through the first flow path layer 10 and the second flow path layer 20. Fig.11 , Fig.12 as well as Fig.13 The schematic representation is shown in Fig.10 The dashed line is a boundary between the first flow path 51 and the second flow path 52 in the cross section shown.

[0065] exist Fig.11 2 shows two first flow path layers 10 and a second flow path layer 20 disposed between the two first flow path layers 10. Fig.11 The ZX plane shown is divided into 6 in the Z-axis direction and 6 in the X-axis direction, and each divided area is represented by a combination of a numerical value indicating a position in the Z-axis direction and a numerical value indicating a position in the X-axis direction. For example, (2, 1) represents a divided area where Z=2 and X=1. Z=2 represents a divided area where Fig.11 The segmented area located at the second position from the positive side in the Z-axis direction. X=1 means Fig.11 The first segment area from the negative side of the X-axis direction. Fig.12 as well as Fig.13 In, also with Fig.11 Likewise, two first flow path layers 10 , one second flow path layer 20 , and each divided region are shown.

[0066] exist Fig.11 In the embodiment, the supply air flow 57 flows through the inlet side flow path 55 spanning six divided regions (1, 1), (1, 2), (1, 3), (1, 4), (1, 5), and (1, 6). In addition, the supply air flow 57 flows through the inlet side flow path 55 spanning twelve divided regions (4, 1), (4, 2), (4, 3), (4, 4), (4, 5), (4, 6), (5, 1), (5, 2), (5, 3), (5, 4), (5, 5), and (5, 6).

[0067] exist Fig.11 In the embodiment, the exhaust gas flow 58 flows through the outlet side flow path 56 spanning twelve divided regions, namely (2, 1), (2, 2), (2, 3), (2, 4), (2, 5), (2, 6), (3, 1), (3, 2), (3, 3), (3, 4), (3, 5), and (3, 6). In addition, the exhaust gas flow 58 flows through the outlet side flow path 56 spanning six divided regions, namely (6, 1), (6, 2), (6, 3), (6, 4), (6, 5), and (6, 6).

[0068] exist Fig.12 Among the six divided areas located at Z=1, three divided areas (1, 2), (1, 4) and (1, 6) are blocked by the second sealing portion 39. The supply airflow 57 after crossing the inlet side flow path 55 of the six divided areas located at Z=1 passes through any one of the three divided areas (1, 1), (1, 3) and (1, 5) and flows to the first flow path 51.

[0069] exist Fig.12 Among the six divided regions located at Z=2, three divided regions (2, 1), (2, 3) and (2, 5) are blocked by the first sealing portion 38. Fig.12 Among the six divided areas located at Z=3, three divided areas (3, 2), (3, 4) and (3, 6) are blocked by the first blocking portion 38. The exhaust flow 58 after passing through each second flow path 52 located at Z=2, 3 flows to the outlet side flow path 56 spanning the twelve divided areas located at Z=2, 3 through any one of the six divided areas (2, 2), (2, 4), (2, 6), (3, 1), (3, 3) and (3, 5).

[0070] exist Fig.12 Among the six divided regions located at Z=4, three divided regions (4, 1), (4, 3) and (4, 5) are blocked by the second sealing portion 39. Fig.12Among the six divided areas located at Z=5, three divided areas (5, 2), (5, 4) and (5, 6) are blocked by the second sealing portion 39. The supply airflow 57 after crossing the inlet side flow path 55 of the twelve divided areas located at Z=4, 5 flows to the first flow path 51 through any one of the six divided areas (4, 2), (4, 4), (4, 6), (5, 1), (5, 3) and (5, 5).

[0071] exist Fig.12 Among the six divided regions located at Z=6, three divided regions (6, 1), (6, 3) and (6, 5) are blocked by the first blocking portion 38. The exhaust gas flow 58 after passing through each second flow path 52 located at Z=6 flows through any one of the three divided regions (6, 2), (6, 4) and (6, 6) to the outlet side flow path 56 spanning the six divided regions located at Z=6.

[0072] exist Fig.12 After the supply airflow 57 passes through the (1, 1) segmentation area, Fig.13 The first flow path 51 spans the two divided regions (1, 1) and (2, 1). Fig.12 After the supply airflow 57 passes through the (1, 3) segmentation area, Fig.13 The liquid flows in the first flow path 51 spanning the two divided regions (1, 3) and (2, 3). Fig.12 After the supply airflow 57 passes through the (1, 5) segmentation area, Fig.13 The liquid flows in the first flow path 51 spanning the two divided regions (1, 5) and (2, 5).

[0073] exist Fig.13 The exhaust gas flow 58 of the second flow path 52 after passing through the two divided areas (1, 2) and (2, 2) is Fig.12 After being collected in the (2, 2) division area, it flows toward the outlet side flow path 56. Fig.13 The exhaust gas flow 58 of the second flow path 52 after passing through the two divided areas (1, 4) and (2, 4) is Fig.12 After being collected in the (2, 4) division area, it flows toward the outlet side flow path 56. Fig.13 The exhaust gas flow 58 of the second flow path 52 after passing through the two divided areas (1, 6) and (2, 6) is Fig.12 After being collected in the (2, 6) division area, it flows toward the outlet side flow path 56.

[0074] exist Fig.13 The exhaust gas flow 58 after passing through the second flow path 52 across the two divided areas (3, 1) and (4, 1) is Fig.12After being collected in the (3, 1) division area, it flows toward the outlet side flow path 56. Fig.13 The exhaust gas flow 58 after passing through the second flow path 52 across the two divided areas (3, 3) and (4, 3) is Fig.12 After being collected in the (3, 3) division area, it flows toward the outlet side flow path 56. Fig.13 The exhaust gas flow 58 after passing through the second flow path 52 across the two divided areas (3, 5) and (4, 5) is Fig.12 After being collected in the (3, 5) division area, it flows toward the outlet side flow path 56.

[0075] exist Fig.12 After the supply airflow 57 passes through the (4, 2) segmentation area, Fig.13 The first flow path 51 spans the two divided regions (3, 2) and (4, 2). Fig.12 After the supply airflow 57 passes through the (4, 4) segmentation area, Fig.13 The first flow path 51 spans the two divided regions (3, 4) and (4, 4). Fig.12 After passing through the (4, 6) segmented area, the supply airflow 57 Fig.13 The liquid flows in the first flow path 51 spanning the two divided regions (3, 6) and (4, 6).

[0076] exist Fig.12 After the supply airflow 57 passes through the (5, 1) segmentation area, Fig.13 The liquid flows in the first flow path 51 spanning the two divided regions (5, 1) and (6, 1). Fig.12 After the supply airflow 57 passes through the (5, 3) segmentation area, Fig.13 The liquid flows in the first flow path 51 spanning the two divided regions (5, 3) and (6, 3). Fig.12 After the supply airflow 57 passes through the (5, 5) segmentation area, Fig.13 The liquid flows in the first flow path 51 spanning the two divided regions (5, 5) and (6, 5).

[0077] exist Fig.13 The exhaust gas flow 58 after passing through the second flow path 52 across the two divided areas (5, 2) and (6, 2) is Fig.12 After being collected in the (6, 2) division area, it flows toward the outlet side flow path 56. Fig.13 The exhaust gas flow 58 after passing through the second flow path 52 across the two divided areas (5, 4) and (6, 4) is Fig.12 After being collected in the (6, 4) segmentation area, it flows toward the outlet side flow path 56. Fig.13The exhaust gas flow 58 after passing through the second flow path 52 across the two divided areas (5, 6) and (6, 6) is Fig.12 After being collected in the (6, 6) division area, it flows toward the outlet side flow path 56.

[0078] like Fig.13 As shown, the first flow path 51 and the second flow path 52 adjacent to each other in the X-axis direction are formed in the first flow path layer 10 and the second flow path layer 20. The heat exchange element 100 can improve the heat exchange efficiency in the supply air flow 57 and the exhaust air flow 58 by making the first flow path 51 and the second flow path 52 adjacent to each other in the X-axis direction.

[0079] The ribs 31 and 41 constituting the first flow path 51 and the second flow path 52 are formed by combining thin plate-like parts and can be manufactured by bending the sheets 30 and 40 by compression molding or the like. Thus, the opposing flow portion 3 having the ribs 31 and 41 can be easily manufactured.

[0080] According to Embodiment 1, the heat exchange element 100 includes: ribs 31 and 41 constituting the opposing flow portion 3; plates 15, 16, 25 and 26 connected to the ends of the ribs 31 and 41; and a first closing portion 38 and a second closing portion 39. The opposing flow portion 3 is constituted by the ribs 31 and 41, so that the first flow path 51 and the second flow path 52 alternately arranged in the X-axis direction can be provided in the opposing flow portion 3. Thus, the heat exchange element 100 can achieve the effect of improving the heat exchange efficiency.

[0081] Implementation method 2.

[0082] Fig.14 1 is a diagram showing a cross section of a rib constituting a heat exchange element according to Embodiment 2. In Embodiment 2, the thicknesses of the side walls 32, 33, and 34 constituting the ribs 31 and 41 are set so as to improve the heat exchange efficiency in the supply airflow 57 and the exhaust airflow 58. In Embodiment 2, the same reference numerals are given to the same components as those in Embodiment 1, and the description will be mainly made of the structures different from those in Embodiment 1.

[0083] exist Fig.14 , a portion including an end portion on the positive side in the Y-axis direction of one rib 31 is shown. The thickness of each of the side wall portions 32, 33, 34 is thinner than the thickness of the upper surface portion 35, and thinner than the thickness of the lower surface portion 36. The rib 41 has the same structure as the rib 31. In the second embodiment, the ribs 31 and 41 are manufactured by compression molding.

[0084] Since each of the side wall portions 32, 33, 34 is thinner than the upper surface portion 35 and the lower surface portion 36, the heat exchange element 100 can improve the heat exchange efficiency in the supply airflow 57 in the first flow path 51 and the exhaust airflow 58 in the second flow path 52, which are respectively separated by the side wall portions 32, 33, 34. Thus, the heat exchange element 100 can improve the heat exchange efficiency. In addition, since the upper surface portion 35 and the lower surface portion 36 are thicker than each of the side wall portions 32, 33, 34, the heat exchange element 100 can ensure rigidity.

[0085] The thickness of each of the side walls 32, 33, 34, the upper surface 35, and the lower surface 36 constituting the ribs 31 and 41 is thinner than the thickness of the outer edge of the sheets 30 and 40. In the second embodiment, the thickness of each of the side walls 32, 33, 34, the thickness of the upper surface 35, and the thickness of the lower surface 36 are all within a range of 2% to 90% of the thickness of the outer edge of the sheets 30 and 40. By processing the sheets 30 and 40 by compression molding, the side walls 32, 33, 34, the upper surface 35, and the lower surface 36 that are thinner than the outer edge of the sheets 30 and 40 can be easily formed.

[0086] In addition, the thickness of each side wall portion 32, 33, 34 is preferably included in the range of 2% to 50% of the thickness of the outer edge portion of the sheet 30, 40. The length of each side wall portion 32, 33, 34 in the direction in which the side wall portions 32, 33, 34 stand upright from each lower surface portion 36 is preferably longer than the length of the upper surface portion 35 in the X-axis direction, and longer than the length of the lower surface portion 36 in the X-axis direction. Thus, the heat exchange element 100 can improve the heat exchange efficiency in the supply airflow 57 in the first flow path 51 and the exhaust airflow 58 in the second flow path 52. In addition, by making the thickness of each side wall portion 32, 33, 34 less than half the thickness of the outer edge portion of the sheet 30, 40, it is easy to manufacture the ribs 31, 41 by compression molding.

[0087] The thickness of the upper surface portion 35 and the thickness of the lower surface portion 36 are preferably in the range of 15% to 90% of the thickness of the outer edge portion of the sheet 30, 40. The upper surface portion 35 and the lower surface portion 36 have the function of maintaining the overall strength of the ribs 31, 41. Therefore, the thickness of the upper surface portion 35 and the thickness of the lower surface portion 36 are preferably at least twice the thickness of each side wall portion 32, 33, 34.

[0088] In addition, the thickness of the lower surface portion 36 is preferably within a range of 50% to 90% of the thickness of the outer edge portion of the sheets 30 and 40. The thickness of the upper surface portion 35 is preferably within a range of 15% to 50% of the thickness of the outer edge portion of the sheets 30 and 40. In the heat exchange element 100, the thickness of the lower surface portion 36 may be within a range of 50% to 90% of the thickness of the outer edge portion of the sheets 30 and 40, and the thickness of the upper surface portion 35 may be within a range of 15% to 50% of the thickness of the outer edge portion of the sheets 30 and 40. Thus, the heat exchange element 100 can ensure the strength of the ribs 31 and 41 as a whole.

[0089] Fig.15 Schematic cross-sectional view of a sheet constituting a heat exchange element according to Embodiment 2. Fig.15 Schematically showing a cross section of the sheet 30. t1 is the thickness of the outer edge of the sheet 30. The outer edge is a portion of the sheet 30 that is not subjected to compression molding. Before the processing for manufacturing the rib 31 is performed, the overall thickness of the sheet 30 is t1. t2 is the thickness of the lower surface portion 36. t3 is the thickness of the upper surface portion 35. t4 is the thickness of the side wall portion 32. The thickness of the side wall portion 33 and the thickness of the side wall portion 34 are also t4, respectively. W is the width in the X-axis direction of the portion of the rib 31 consisting of the two side wall portions 33, 34 and the lower surface portion 36. W is the spacing between the side wall portions 32, 33, and 34. H is the length of the rib 31 in the Z-axis direction, and is the length from the upper surface portion 35 to the lower surface portion 36.

[0090] Since the parts constituting the rib 31 are compression-formed parts, t2, t3, and t4 are all thinner than t1. In addition, in Embodiment 2, t1 is 400 μm, t2 is 330 μm to 350 μm, and t3 is 100 μm to 120 μm. When W:H, which is the aspect ratio of the rib 31, is 1:7, t4 is 10 μm. When W:H is 1:5, t4 is 15 μm. When W:H is 1:4, t4 is 21 μm. When W:H is 1:3.4, t4 is 32 μm. W is 2000 μm to 3000 μm. W is most preferably 2500 μm. The thickness of each part of the sheet 30 and the rib 31 preferably satisfies t1>t2>t3>t4.

[0091] The thinner t4 of the heat exchange element 100 is, the higher the heat exchange efficiency between the supply airflow 57 and the exhaust airflow 58 can be. However, if t4 is too thin, the side walls 32, 33, 34 are more likely to be damaged, so the limit of thinning t4 is preferably about 10 μm.

[0092] By stacking the ribs 31 and 41, a load in the Z-axis direction is applied to the rib 31. This load becomes an important factor in the central deflection of the length of the rib 31 in the X-axis direction when both ends of the rib 31 in the X-axis direction are supported. However, since the rib 31 is reinforced by each of the plate portions 15 and 16, the first closing portion 38, and the second closing portion 39, the deformation of the rib 31 caused by the central deflection of the length of the rib 31 in the X-axis direction can be suppressed.

[0093] This load becomes an important factor in the central deflection of the length of the rib 31 in the Y-axis direction when both ends of the rib 31 in the Y-axis direction are supported. The strength of the rib 31 with respect to this deflection is determined by each of t2, t3, and t4. Since t4 is desired to be as thin as possible as described above, the side walls 32, 33, and 34 have a small function as a strength member for this deflection. Therefore, the strength of the rib 31 with respect to this deflection is determined by t2 and t3.

[0094] Since the rib 31 is formed by compression molding, the average values ​​of t2 and t3 are substantially constant. That is, if t2 is made thicker, t3 is made thinner. When the average values ​​of t2 and t3 are constant, the strength of the rib 31 is higher when t2 and t3 are different from each other compared to the case where t2 and t3 are the same. For example, the strength of the rib 31 is higher when t2=340μm and t3=110μm than when t2=t3=225μm. Therefore, the rib 31 preferably satisfies t2>t3. It is more preferable that t2≈2×t3.

[0095] For example, in Fig.15 The air flowing in the flow path in the area represented by H×W in the ZX cross section of the rib 31 is heat exchanged through the portion of length H in the rib 31, that is, each side wall portion 32, 33, 34. In order to promote heat exchange, the rib 31 preferably satisfies H>W. In addition, H is preferably at least twice as large as W. In the rib 31, heat exchange is performed by the opposing flows on the surface side of one side and the surface side of the other side of each side wall portion 32, 33, 34. By setting H to be at least twice as large as W, the ratio of the length of the portion where heat exchange is performed to the cross-sectional area of ​​the flow path is increased, thereby enabling the heat exchange efficiency of the heat exchange element 100 to be improved.

[0096] In addition, each side wall portion 32, 33, 34 may be erected along the Z-axis direction, or may be erected as shown in FIG. Fig.14As shown, it is inclined relative to the Z-axis direction. When each side wall portion 32, 33, 34 is inclined relative to the Z-axis direction, each side wall portion 32, 33, 34 is connected to the upper surface portion 35 at an obtuse angle, and each side wall portion 32, 33, 34 is connected to the lower surface portion 36 at an obtuse angle. In this way, by inclining each side wall portion 32, 33, 34 in a manner that forms an obtuse angle with the upper surface portion 35 and the lower surface portion 36, respectively, the rib 31 is easily formed. In this case, the inclination angle of each side wall portion 32, 33, 34 relative to the Z-axis direction as the stacking direction is preferably 30 degrees or less. By making the inclination angle less than 30 degrees, the ratio of the length of the portion where heat exchange is performed to the cross-sectional area of ​​the flow path is increased, thereby the heat exchange efficiency of the heat exchange element 100 can be improved.

[0097] In addition, the rib 31 preferably satisfies t3>t4. t3 is preferably within the range of 3×t4 to 7×t4, and more preferably t3≈5×t4. Thus, the heat exchange element 100 can improve the heat exchange rate while ensuring the strength of the side walls 32, 33, and 34.

[0098] Implementation method 3.

[0099] In Embodiment 3, an example of a heat exchange element having the same structure as that of the heat exchange element in Embodiment 1 or 2 will be described. Fig.16 This is a perspective view showing the overall structure of a heat exchange element according to Embodiment 3. In Embodiment 3, the same components as those in Embodiment 1 or 2 are denoted by the same reference numerals, and the structure different from Embodiment 1 or 2 will be mainly described.

[0100] The heat exchange element 60 of Embodiment 3 is an opposing flow type heat exchange element. The heat exchange element 60 is a stacked body having alternately stacked first flow path forming members 61 and second flow path forming members 62. The number of first flow path forming members 61 constituting the heat exchange element 60 and the number of second flow path forming members 62 constituting the heat exchange element 60 are both arbitrary.

[0101] The heat exchange element 60 includes an opposing flow section 63 for performing heat exchange between the supply airflow and the exhaust airflow, a first separation flow path section 64, and a second separation flow path section 65. The opposing flow section 63 has the same structure as the opposing flow section 3 of Embodiment 1 or 2. The opposing flow section 63 includes a first flow path and a second flow path, and the second flow path allows the exhaust airflow 58 to flow in the opposite direction to the supply airflow 57 passing through the first flow path. That is, in the opposing flow section 63, the traveling direction of the supply airflow 57 and the traveling direction of the exhaust airflow 58 are 180 degrees different from each other. The opposing flow section 63 is in the shape of a rectangular parallelepiped.

[0102] The heat exchange element 60 exchanges sensible heat between the supply airflow 57 and the exhaust airflow 58 by heat conduction between the first and second flow paths. The heat exchange element 60 exchanges latent heat between the supply airflow 57 and the exhaust airflow 58 by circulating water vapor between the first and second flow paths.

[0103] The first separation flow path section 64 is connected to the end of the opposing flow section 63 on the upstream side of the supply flow 57 and the downstream side of the exhaust flow 58. The second separation flow path section 65 is connected to the end of the opposing flow section 63 on the downstream side of the supply flow 57 and the upstream side of the exhaust flow 58. The first separation flow path section 64 and the second separation flow path section 65 are each in the shape of a triangular prism.

[0104] The first separation flow path section 64 is provided with an inlet side flow path 55 for the supply flow 57 and an outlet side flow path 56 for the exhaust flow 58. The first separation flow path section 64 has a partition plate 66 and a partition rib 67. The partition plate 66 is equivalent to Figure 2 The plate portion 15 or Figure 3 The partition plate 66 partitions the inlet side flow path 55 and the outlet side flow path 56 .

[0105] The partition rib 67 has a rectangular cross section. In one example, the partition rib 67 is manufactured by molding a resin material. The partition rib 67A provided in the first flow path forming member 61 among the partition ribs 67 partitions the inlet side flow path 55. The partition rib 67A is equivalent to Figure 2 The partition ribs 67B provided in the second flow path forming member 62 of the partition ribs 67 partition the outlet side flow path 56. The partition ribs 67B are equivalent to Figure 2 The components of the flow path wall 28 are shown.

[0106] The second separation channel section 65 is provided with an outlet channel for the supply flow 57 and an inlet channel for the exhaust flow 58. The second separation channel section 65 is configured similarly to the first separation channel section 64. The configuration of the second separation channel section 65 is omitted from illustration.

[0107] In the first separation flow path section 64, the upstream end of the inlet side flow path 55 of the supply air flow 57 and the downstream end of the outlet side flow path 56 of the exhaust air flow 58 face different directions. In the second separation flow path section 65, the downstream end of the outlet side flow path of the supply air flow 57 and the upstream end of the inlet side flow path of the exhaust air flow 58 face different directions.

[0108] In Embodiment 3, the opposing flow portion 63 has ribs 31 and 41, first closing portion 38, and second closing portion 39 similarly to the opposing flow portion 3 of Embodiment 1 or 2. The heat exchange element 60 can improve heat exchange efficiency similarly to the heat exchange element 100 of Embodiment 1 or 2.

[0109] Implementation method 4.

[0110] In Embodiment 4, a heat exchange ventilator including heat exchange element 100 according to Embodiment 1 or 2 will be described. Fig.17 1 is a diagram showing a schematic structure of a heat exchange ventilator according to Embodiment 4. The heat exchange ventilator 80 according to Embodiment 4 includes a heat exchange element 100 according to Embodiment 1 or 2. The heat exchange ventilator 80 performs indoor ventilation by taking in a supply airflow 57 from the outside into the room and sending out an exhaust airflow 58 from the room to the outside. In addition, the heat exchange ventilator 80 performs heat exchange between the supply airflow 57 and the exhaust airflow 58 in the heat exchange element 100.

[0111] A supply air path 87 through which the supply air flow 57 passes and an exhaust air path 88 through which the exhaust air flow 58 passes are formed in the housing 89 of the heat exchange ventilation device 80. An air supply blower 85 for generating the supply air flow 57 is provided in the supply air path 87. An exhaust air blower 86 for generating the exhaust air flow 58 is provided in the exhaust air path 88. Fig.17 Components provided inside the housing 89 are schematically shown in FIG.

[0112] An air supply outlet 82 and an exhaust air inlet 83 are provided on the side of the indoor side of the housing 89. An air supply inlet 81 and an exhaust air outlet 84 are provided on the side of the outdoor side of the housing 89. The heat exchange ventilation device 80 generates a supply air flow 57 by operating the supply air blower 85 to take in outdoor air from the supply air inlet 81 to the supply air flow path 87. The supply air flow 57 passes through the supply air flow path 87 and is blown out from the supply air outlet 82 toward the indoor side. In addition, the heat exchange ventilation device 80 generates an exhaust air flow 58 by operating the exhaust air blower 86 to take in indoor air from the exhaust air inlet 83 to the exhaust flow path 88. The exhaust air flow 58 passes through the exhaust flow path 88 and is blown out from the exhaust air outlet 84 toward the outdoors.

[0113] The heat exchange element 100 is arranged at a position where the supply air flow path 87 and the exhaust air flow path 88 intersect. The heat exchange element 100 performs total heat exchange between the supply air flow 57 and the exhaust air flow 58. The heat exchange ventilator 80 recovers the sensible heat and latent heat of the exhaust air flow 58 from the room through total heat exchange in the heat exchange element 100, and transfers the recovered sensible heat and latent heat to the supply air flow 57. In addition, the heat exchange ventilator 80 recovers the sensible heat and latent heat of the supply air flow 57 from the outside, and transfers the recovered sensible heat and latent heat to the exhaust air flow 58. The heat exchange ventilator 80 can improve the efficiency of indoor cooling and heating and the efficiency of dehumidification and humidification, and can reduce the energy used for indoor air conditioning. In addition, the heat exchange ventilator 80 can also replace the heat exchange element 100 of embodiment 1 or 2, and have the heat exchange element 60 of embodiment 3.

[0114] The heat exchange ventilator 80 according to the fourth embodiment can improve the heat exchange efficiency by including the heat exchange element 100 according to the first or second embodiment, or the heat exchange element 60 according to the third embodiment.

[0115] The structure shown in the above embodiments is an example of the content of the present disclosure. The structure of each embodiment can be combined with other known technologies. The structures of each embodiment can also be appropriately combined with each other. Within the scope of not departing from the main purpose of the present disclosure, a part of the structure of each embodiment can be omitted or changed.

[0116] Description of Reference Numerals

[0117] 1, 61... first flow path forming member; 2, 62... second flow path forming member; 3, 63... opposite flow portion; 10... first flow path layer; 11... first inlet header portion; 12... first outlet header portion; 13, 14, 23, 24, 37... end portion; 15, 16, 25, 26... plate portion; 17, 18, 27, 28... flow path wall; 20... second flow path layer; 21... second inlet header portion; 22... second outlet header portion; 30, 40... sheet material; 31, 41... rib portion; 32, 33, 34... side wall portion; 35... upper surface portion; 36... lower surface portion; 38... first sealing portion; 39 ...second sealing portion; 51...first flow path; 52...second flow path; 55...inlet side flow path; 56...exit side flow path; 57...supply air flow; 58...exhaust air flow; 60, 100...heat exchange element; 64...first separation flow path portion; 65...second separation flow path portion; 66...partition plate; 67, 67A, 67B...partition ribs; 80...heat exchange ventilation device; 81...supply air suction port; 82...supply air outlet; 83...exhaust air suction port; 84...exhaust outlet; 85...supply air blower; 86...exhaust blower; 87...supply air path; 88...exhaust flow path; 89...housing.

Claims

1. A heat exchange element, comprising a first flow path forming member and a second flow path forming member which are alternately stacked and constitute an opposing flow portion, the opposing flow portion comprising a first flow path for air to pass through, and a second flow path for air to flow in a direction opposite to the air passing through the first flow path, characterized in that: The first flow path forming member and the second flow path forming member each have: a rib portion having: a first wall portion constituting an end portion of the first flow path in a first direction in which the first flow path forming member and the second flow path forming member are stacked, a second wall portion constituting an end portion of the second flow path in the first direction, and a third wall portion that separates the first flow path and the second flow path that are adjacent to each other in a second direction perpendicular to the first direction and constitutes the opposing flow portion; a plate portion connected to an end portion of the rib portion in a third direction perpendicular to the first direction and the second direction, and separating a first connecting flow path connected to the first flow path and a second connecting flow path connected to the second flow path, a first sealing portion, which is disposed at the end of the rib and blocks the first flow path and the second connecting flow path; as well as The second sealing portion is provided at the end of the rib portion and blocks the second flow path and the first connecting flow path.

2. The heat exchange element according to claim 1, characterized in that The thickness of the third wall portion is thinner than the thickness of the first wall portion, and thinner than the thickness of the second wall portion.

3. The heat exchange element according to claim 1 or 2, characterized in that: The second wall portion is thinner than the first wall portion.

4. The heat exchange element according to claim 1 or 2, characterized in that: The length of the third wall portion in a direction in which the third wall portion stands upright from the first wall portion is longer than the length of the first wall portion in the second direction, and is longer than the length of the second wall portion in the second direction.

5. The heat exchange element according to claim 1 or 2, characterized in that: The first flow path forming member and the second flow path forming member each include a sheet material on which the ribs are formed, The thickness of the first wall portion, the thickness of the second wall portion, and the thickness of the third wall portion are each thinner than the thickness of an outer edge portion of the sheet.

6. A heat exchange ventilation device, characterized in that: have: a supply air blower that generates a supply air flow; an exhaust blower that generates an exhaust flow; and a heat exchange element for exchanging heat between the supply air flow and the exhaust air flow, The heat exchange element is the heat exchange element according to any one of claims 1 to 5.

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